package com.example.zuo.mysuperwidgetdemo.widget;

/*
 * Copyright (C) 2014 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Rect;
import android.graphics.drawable.ColorDrawable;
import android.graphics.drawable.Drawable;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.View;

import com.example.zuo.mysuperwidgetdemo.utils.DensityUtil;


/**
 * This class is from the v7 samples of the Android SDK. It's not by me!
 * <p/>
 * See the license above for details.
 */
public class DividerItemDecoration extends RecyclerView.ItemDecoration {

    private static final int[] ATTRS = new int[]{android.R.attr.listDivider};

    public static final int HORIZONTAL_LIST = LinearLayoutManager.HORIZONTAL;

    public static final int VERTICAL_LIST = LinearLayoutManager.VERTICAL;


    private Drawable mDivider;
    private Context context;
    private int mOrientation;
    private int height;
    private int paddingLength = 0;

    /**
     * @param resId       color资源id
     * @param height      分割线高度 //单位dp
     * @param orientation 分割线方向
     *                    created at 2016/9/22 12:23
     * @author zwc
     **/
    public DividerItemDecoration(Context context, int orientation, int resId, int height) {
        mDivider = context.getResources().getDrawable(resId);
        final TypedArray a = context.obtainStyledAttributes(ATTRS);
       // mDivider = new ColorDrawable(context.getResources().getColor(resId));
        //  mDivider = a.getDrawable(0);
        this.context = context;
        this.height = height;
        a.recycle();
        setOrientation(orientation);
    }
    /**
     * @param resId       color资源id
     * @param height      分割线高度 //单位dp
     * @param orientation 分割线方向
     * @param paddingLength padding 距离
     *                    created at 2016/9/22 12:23
     * @author zwc
     **/
    public DividerItemDecoration(Context context, int orientation, int resId, int height, int paddingLength) {
        //mDivider = context.getResources().getDrawable(resId);
        final TypedArray a = context.obtainStyledAttributes(ATTRS);
        mDivider = new ColorDrawable(context.getResources().getColor(resId));
        //  mDivider = a.getDrawable(0);
        this.context = context;
        this.height = height;
        this.paddingLength = paddingLength;
        a.recycle();
        setOrientation(orientation);
    }

    public void setOrientation(int orientation) {
        if (orientation != HORIZONTAL_LIST && orientation != VERTICAL_LIST) {
            throw new IllegalArgumentException("invalid orientation");
        }
        mOrientation = orientation;
    }

    @Override
    public void onDraw(Canvas c, RecyclerView parent) {
        Log.v("recyclerview", "onDraw()");
        if (mOrientation == VERTICAL_LIST) {
            drawVertical(c, parent);
        } else {
            drawHorizontal(c, parent);
        }
    }

    public void drawVertical(Canvas c, RecyclerView parent) {
        final int left = parent.getPaddingLeft() + DensityUtil.dip2px(context, paddingLength);
        final int right = parent.getWidth() - parent.getPaddingRight() - DensityUtil.dip2px(context, paddingLength);

        final int childCount = parent.getChildCount();

        for (int i = 0; i < childCount; i++) {
            final View child = parent.getChildAt(i);
            RecyclerView v = new RecyclerView(
                    parent.getContext());
            final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child
                    .getLayoutParams();
            final int top = child.getBottom() + params.bottomMargin;
            // final int bottom = top + mDivider.getIntrinsicHeight();
            final int bottom = top + DensityUtil.dip2px(context, height);
            mDivider.setBounds(left, top, right, bottom);
            mDivider.draw(c);
        }
    }

    public void drawHorizontal(Canvas c, RecyclerView parent) {
        final int top = parent.getPaddingTop() + DensityUtil.dip2px(context, paddingLength);
        final int bottom = parent.getHeight() - parent.getPaddingBottom() - DensityUtil.dip2px(context, paddingLength);

        final int childCount = parent.getChildCount();
        for (int i = 0; i < childCount; i++) {
            final View child = parent.getChildAt(i);
            final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child
                    .getLayoutParams();
            final int left = child.getRight() + params.rightMargin;
            final int right = left + DensityUtil.dip2px(context, height);
            mDivider.setBounds(left, top, right, bottom);
            mDivider.draw(c);
        }
    }

    @Override
    public void getItemOffsets(Rect outRect, int itemPosition,
                               RecyclerView parent) {
        if (mOrientation == VERTICAL_LIST) {
            // outRect.set(0, 0, 0, mDivider.getIntrinsicHeight());
            outRect.set(0, 0, 0, DensityUtil.dip2px(context, height));
        } else {
            outRect.set(0, 0, DensityUtil.dip2px(context, height), 0);
        }
    }
}
